18 
NEW-YORK FAUNA — BIRDS. 
COOPER’S HAWK. 
I 
Astur cooperi. 
PLATE IV. FIG. 5 (Adult male). 
(STATE COLLECTION. Young male.) 
Falco cooperi. Bonap. Lyceum Nat. Hist. N. Y. Vol. 2, p. 433. 
F. id. Id. Am. Orn. Vol. 2, pi. 10, fig. 1 (young). 
F. stanlei , Stanley's Hawk. Audubon, folio, pi. 36, 141 ; Orn. Biog. Vol. 1, p. 189; and Vol. 2, p. 265. 
Falco stanlei. Ni/ttaLL, Manual, Vol 1, p 91. 
Cooper's Hawk. Audubon, B. of A. Vol. 1, p. 98, pi. 24 (male and female). 
F. cooperi . Cooper s Hawk. KlRTLAND, Zool. of Ohio, p. 179. 
Astur cooperi. Giraud, Birds of Long island, p. 20. 
Characteristics. Bluish grey above; tail barred and distinctly rounded. Young , dusky 
brown, spotted with white. Larger than the preceding. Length, 20 
inches. 
Description. Bill robust, curved from the base, and abruptly so at the tip. Tail eight 
inches long, and extending five inches beyond the wings. Legs slender, 2-7 long, and, with 
the toes, not reaching the tip of the tail ; inner and hind claw largest. Tail rounded. 
Color. Above bluish grey ; beneath reddish or white and reddish, with rust-col >red trans¬ 
verse bars. Primaries reddish brown, crossed occasionally with blackish bands. Thigh- 
feathers with brown bars or arrow-head spots. Tail inclining to slate-grey, with four broad 
blackish brown bands, and broadly tipped with white. Cere and legs yellow. Bill bluish, 
passing into black at the tip. 
Length, 18'0 - 22‘0. Alar extent, 30-0-32-0. 
This species, which had been previously confounded with the preceding, was first detected 
as distinct by Charles Bonaparte. It is a bold and swift bird, attacking chiefly the smaller birds. 
Breeds in the mountainous districts of the Northern and Middle Slates, laying 3-4 round, 
rough, white eggs. Its geographical range appears to be confined between the 29lh and 41st 
parallels, being seldom found north of this State. 
